My screen is 1920x1080 pixels. What do you mean "so you can move the pieces outside"? When I tried to move a piece and leave it off the puzzle it didn't stay there.

Every act cycle that 'e' is pressed more red lobsters spawn, so it's hard to control the amount of red lobsters that spawn per press. Either make a delay for spawning them, or make it that no matter how long you're holding the key nothing will happen unless you release the key then repress it. The sheep can only shoot to the (and face) right, so if there is a lobster on the left (behind the sheep) I can't do much, but I would probably automatically win if I make it to the left side of the screen (and hold down the space bar).

I can't see the update because it says "Error. Click for details", then when I click it says "NullPointerException" in an Aplication Error window.